# Khan Academy Authors - Big-Θ (Big-Theta) Notation (Article) (Highlights)  ## Highlights - When we say that a particular running time is Θ(n) \Theta(n) Θ(n)\Theta, left parenthesis, n, right parenthesis, we're saying that once n n nn gets large enough, the running time is at least k1⋅n k\_1 \cdot n k1​⋅nk, start subscript, 1, end subscript, dot, n and at most k2⋅n k\_2 \cdot n k2​⋅nk, start subscript, 2, end subscript, dot, n for some constants k1 k\_1 k1​k, start subscript, 1, end subscript and k2 k\_2 k2​k, start subscript, 2, end subscript.